Cryptic crossword No 1,704

Across

1. Naval operation's beginning around legendary island (6)
2. Uneven progress, reportedly (6)
3. Minor celebrity is a pest (7)
4. File captured during revolution in Zaire is so damaging (7)
5. Bones openly scorns Starfleet Academy leaders (4)
6. Ratify Democratic reform (5)
7. European capital suggests two-state solution (4)
8. Tedium of Rouen nuit? (5)
9. Getting hot right away from running (8)
10. Career women leaving West Point, exhilarated (4,2,2)
11. Brush off first sign of collapsing peso (5)
12. Reserve bishop, advance two knights (4)
13. Get irate when a clue like this has no answer (5)
14. Costly for German empire to lose Eastern Front (4)
15. Perhaps read excerpt from Letters to Machiavelli (7)
16. It may be John Lennon tune - Amsterdam, perhaps? (7)
17. Refusal of joint call from the Rev. Spooner (6)
18. At the table, full, eating second portion of dessert (6)

Down

1. Book of maps for a northbound sailor (5)
2. Give up absinth? Hard to quit for a drunk (7)
3. Mission: Start to overthrow a country after navy withdraws (9)
4. Ancient poet claims prose, at heart, is elliptical (5)
5. Stump orator could be raving atop this? (7)
6. Come together in space above church for Advent (9)
7. Thrill in a Stones re-mix (9)
8. Selected region in River Dee (9)
9. Dissolute exes' vices are over the top (9)
10. Old soldier suffering kleptomania loses a lot, tragically (7)
11. Protection for fighter has standard athletic fit (7)
12. Choice of an oddly light brown colour (5)
13. Was concerned about article regarding Germany (5)